/*
 * Licensed to Elastic Search and Shay Banon under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Elastic Search licenses this
 * file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.elasticsearch.util.concurrent;

import org.elasticsearch.ElasticSearchException;
import org.elasticsearch.ElasticSearchInterruptedException;

import java.util.concurrent.ExecutionException;

/**
 * @author kimchy (Shay Banon)
 */
public class Futures {

    public static ElasticSearchException convert(Exception e) {
        if (e instanceof ExecutionException) {
            if (e.getCause() instanceof ElasticSearchException) {
                return (ElasticSearchException) e.getCause();
            }
            return new UncategorizedExecutionException(e.getCause().getMessage(), e.getCause());
        }
        if (e instanceof InterruptedException) {
            return new ElasticSearchInterruptedException(e.getMessage(), e.getCause());
        }
        if (e instanceof ElasticSearchException) {
            return (ElasticSearchException) e;
        }
        return new UncategorizedExecutionException(e.getMessage(), e);
    }

    private Futures() {

    }
}
